
<div id="a1">
  <div class="container">
    <div class="row">
      <div class="col-sm-6 col-md-4">
        <div class="thumbnail">
          <img src="../../assets/imgs/7.jpg" alt="...">
          <div class="caption">
            <h3>Thumbnail label</h3>
            <p>...</p>
            <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
          </div>
        </div>
      </div>
      <div class="col-sm-6 col-md-4">
        <div class="thumbnail">
          <img src="../../assets/imgs/7.jpg" alt="...">
          <div class="caption">
            <h3>Thumbnail label</h3>
            <p>...</p>
            <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
          </div>
        </div>
      </div>
      <div class="col-sm-6 col-md-4">
        <div class="thumbnail">
          <img src="../../assets/imgs/7.jpg" alt="...">
          <div class="caption">
            <h3>Thumbnail label</h3>
            <p>...</p>
            <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
          </div>
        </div>
      </div>
      <div class="col-sm-6 col-md-4">
        <div class="thumbnail">
          <img src="../../assets/imgs/7.jpg" alt="...">
          <div class="caption">
            <h3>Thumbnail label</h3>
            <p>...</p>
            <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
          </div>
        </div>
      </div>
    </div>

  </div>
</div>
